brake light help

my brake lights aren't coming on, the bulbs are new so they are not the cause of the problem, i am thinking its either electrical or the switch. does anyone know of a way to test the switch or if using a wire to connect the wires in the connection to the switch will be enough to make the light come on? I have tried connecting a few of the wires but with no luck, can anyone else try this and see if they have the same results?
 
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